SM4-90 Semi/Auto Control Lever SRC.
It appears you're referring to the semi-auto/auto control lever for the SM4-90 model by SRC. This lever likely allows the user to switch between semi-automatic and fully automatic firing modes on the airsoft gun. It's a key feature for controlling the firing mechanism and adjusting the rate of fire according to the user's preference or tactical needs during gameplay.
SM4-90 Semi/Auto Control Lever SRC.
It appears you're referring to the semi-auto/auto control lever for the SM4-90 model by SRC. This lever likely allows the user to switch between semi-automatic and fully automatic firing modes on the airsoft gun. It's a key feature for controlling the firing mechanism and adjusting the rate of fire according to the user's preference or tactical needs during gameplay.
